Biogeosciences
Biogeosciences
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Articles | Volume 21, issue 24
Articles | Volume 21, issue 24
https://doi.org/10.5194/bg-21-5725-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-21-5725-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 24
Research article
 | 
20 Dec 2024
Research article |  | 20 Dec 2024

Seasonal and spatial pattern of dissolved organic matter biodegradation and photodegradation in boreal humic waters

Artem V. Chupakov, Natalia V. Neverova, Anna A. Chupakova, Svetlana A. Zabelina, Liudmila S. Shirokova, Taissia Ya. Vorobyeva, and Oleg S. Pokrovsky

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Short summary
In the boreal humic waters of a forest lake and bog, the rate of dissolved organic matter photodegradation is 4 times higher than that of biodegradation. However, given the shallow, light-penetrating layer, the biodegradation provides the largest contribution to CO2 emissions from water surfaces. Trace metals were partially removed (1–10 %) during photodegradation and biodegradation via precipitation of Fe(III) hydroxides after destabilization of organoferric colloids and organic complexes.
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